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TG/DTA/MS Study of the thermal decomposition of FeSO<sub>4</sub>·6H<sub>2</sub>O

By Patrick Masset, Jean-Yves Poinso and Jean-Claude Poignet

Abstract

International audienceThe thermal decomposition of FeSO4•6H2O was studied by mass spectroscopy coupled with DTA/TG thermal analysis under inert atmosphere. On the ground of TG measurements, the mechanism of decomposition of FeSO4•6H2O is: i) three dehydration steps FeSO4•6H2O FeSO4•4H2O+2H2O FeSO4•4H2O FeSO4•H2O+3H2O FeSO4•H2O FeSO4+H2O ii) two decomposition steps 6FeSO4 Fe2(SO4)3+2Fe2O3+2SO2 Fe2(SO4)3 Fe2O3+3SO2+3/2O2 The intermediate compound was identified as Fe2(SO4)3 and the final product as the hematite Fe2O3

Topics: DTA/TG, dehydration, FeSO4 center dot 6H(2)O, mass spectrometry, [CHIM.MATE]Chemical Sciences/Material chemistry
Publisher: 'Springer Science and Business Media LLC'
Year: 2006
DOI identifier: 10.1007/s10973-005-7267-6
OAI identifier: oai:HAL:hal-00386403v1
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